2322 VADA FLOW BOSS DIGITAL WATER SWITCHING UNIT VFB-DSU INSTALLATION MANUAL
3. If there is water in the tank and the
pump reprimes, it will revert to normal
operation mode.
4. If there is no rainwater in the tank, it will
proceed to check the system as per steps
1–3. It will then also lock out the pump for
a period of 7 days.
5. After 7 days the switching unit will
automatically reset and recheck for
rainwater availability in the tank.
GENERAL OPERATION
Loss of Prime
On occasion, the pump may not be able to
reprime itself after the tank has refilled. This
will require intervention from the homeowner
to reprime the pump to gain full use of
the system. Refer to the pump manual for
instructions on how to reprime the pump.
Tip: Loss of prime is greatly reduced if a float
switch is installed. For instructions on how to
install a float switch, refer to page 11.
Loss of Power
If power to the switching unit is interrupted,
the system will automatically default to mains
water supply. When power is restored, the
switching unit will revert to normal operation.
Loss of Mains Supply Water
If town supply water is shut off in your area,
the switching unit may not be able to detect
water demand in the household (e.g. if the
toilet cistern needs refilling). You can override
normal control and start the pump to supply
water out of the rain tank. Simply press the
‘Mode’ button.
FAULT MODE
FLOATLESS OPERATION
Important: It is strongly recommended to
install a float switch. Refer to page 11 for
installation instructions.
The Digital Water Switching Unit is designed
to supply rainwater from the tank to meet
household demand. If the unit detects the
flowrate of rainwater falling below the value set
in ‘Cut Out Flow’, and pressure drops below
the ‘Min Pressure’ setting, the unit will shut the
pump off and revert to mains water supply.
1. The LED on the switching unit will flash red
during this period to indicate the tank water
is not available.
2. After 24 hours the switching unit will
automatically reset and allow the pump to
operate and check for rainwater.
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